What does PTSN stand for?
PTSN stands for "Public Telephone Switch network"
How to abbreviate "Public Telephone Switch network"?
"Public Telephone Switch network" can be abbreviated as PTSN
What is the meaning of PTSN abbreviation?
The meaning of PTSN abbreviation is "Public Telephone Switch network"
What does PTSN mean?
PTSN as abbreviation means "Public Telephone Switch network"
